--Hello! Are you Zhang Hong? --____. A.Yes, I am. B.No, I am. C.Yes, I'm not.
( )—What is thirty and twelve? —It’ s ___________.
( )
( )—__________your brother here? —__________,he isn’ t here.
( )—__________the bike? —Look! It’ s under the tree.
( )Jim and I__________ students. We__________in the same class.
( )Lily is a new student.__________is English.